Datasheet
Table Of Contents
- Figure 1. Application circuit
- 1 Pin settings
- 2 Maximum ratings
- 3 Electrical characteristics
- 4 Functional description
- 5 Application information
- 5.1 Input capacitor selection
- 5.2 Inductor selection
- 5.3 Output capacitor selection
- 5.4 Compensation network
- 5.5 Thermal considerations
- 5.6 Layout considerations
- 5.7 Application circuit
- Figure 18. Demonstration board application circuit
- Table 9. Component list
- Figure 19. PCB layout (component side)
- Figure 20. PCB layout (bottom side)
- Figure 21. PCB layout (front side)
- Figure 22. Junction temperature vs output current
- Figure 23. Junction temperature vs output current
- Figure 24. Junction temperature vs output current
- Figure 25. Efficiency vs output current
- Figure 26. Efficiency vs output current
- Figure 27. Efficiency vs output current
- Figure 28. Load regulation
- Figure 29. Line regulation
- Figure 30. Short circuit behavior
- Figure 31. Load transient: from 0.1 A to 0.7 A
- Figure 32. Soft-start
- 6 Application ideas
- 7 Package mechanical data
- 8 Order codes
- 9 Revision history

L5980 Application information
Doc ID 13003 Rev 6 33/42
Figure 28. Load regulation Figure 29. Line regulation
Figure 30. Short circuit behavior Figure 31. Load transient: from 0.1 A to 0.7 A
Figure 32. Soft-start
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Io [A]
Δ
V
FB
/V
FB
[%]
V
CC
=3.3V
V
CC
=12V
V
CC
=5.0V
F
SW
=250KHz
-0.05
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
2 4 6 8 10 12 14 16 18
VCC [V]
Δ
VFB/VFB [%]
Io=0.7A
-0.05
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
2 4 6 8 10 12 14 16 18
VCC [V]
Δ
VFB/VFB [%]
Io=0.7A
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
Time base 5ms/div
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
Time base 5ms/div
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
Time base 5ms/div
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
OUT
10V/div
I
L
250mA/div
V
OUT
1V/div
OUTPUT
SHORTED
Time base 5ms/div
I
L
200mA/div
V
OUT
50mV/div
AC coupled
C
OUT
=47μF
L=15μH
F
SW
=520KHz
Time base 100μs/div
Load slew rate 2.5A/μs
I
L
200mA/div
V
OUT
50mV/div
AC coupled
C
OUT
=47μF
L=15μH
F
SW
=520KHz
Time base 100μs/div
Load slew rate 2.5A/μs
V
OUT
500mV/div
V
FB
200mV/div
I
L
500mA/div
Time base 1ms/div
V
OUT
500mV/div
V
FB
200mV/div
I
L
500mA/div
Time base 1ms/div